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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Danthonia domingensis
HABIT Perennial; caespitose; clumped densely. Basal innovations intravaginal. Culms erect; 20–60 cm long; 3–4 -noded; with 0.5 of their length below uppermost node; disarticulating at the nodes. Lateral branches lacking. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs ciliate; 2 mm long. Ligule a fringe of hairs. Leaf-blades erect; 20–50 cm long; 1–5 mm wide. Leaf-blade surface pubescent; hairy adaxially.
INFLORESCENCE Inflorescence a panicle; comprising 10–30 fertile spikelets.
Panicle open; elliptic; 8–15 cm long; 1–3 cm wide; bearing few spikelets. Panicle branches pubescent.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2–10 mm long; pubescent.
FERTILE SPIKELETS Spikelets comprising 5–7 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 14–20 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1–1.5 mm long. Floret callus evident; 1.5–2 mm long; pubescent.
GLUMES Glumes persistent; similar; shorter than spikelet, or reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate; 10–18 mm long; 0.8–0.9 length of upper glume; membranous; without keels; 3–5 -veined. Lower glume apex acuminate. Upper glume lanceolate; 14–20 mm long; 2.5 length of adjacent fertile lemma; membranous; without keels; 3–5 -veined. Upper glume apex acuminate.
FLORETS Fertile lemma ovate; 5–8 mm long; chartaceous; without keel; 9 -veined. Lemma surface pilose; hairy below. Lemma hairs 1 mm long. Lemma apex lobed; 2 -fid; incised 0.33 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; 7.5–14 mm long overall; with twisted column. Lateral lemma awns arising on apex of lobes; 2–6 mm long; shorter than principal. Palea 5–8 mm long; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; cuneate; 0.7–1 mm long; fleshy; glabrous. Anthers 3; 1.5–3 mm long.
FRUIT Caryopsis with adherent pericarp; 2.5 mm long. Embryo 0.33 length of caryopsis. Hilum elliptic.
CLEISTOGENES AND VIVIPARY Cleistogenes present; in lower sheaths.
DISTRIBUTION South America: Caribbean.
NOTES Arundineae. Conert 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
